Imaging apparatus and image blur correction method

a technology of image blur and imaging apparatus, which is applied in the field of imaging apparatus and image blur correction method, can solve the problems of difficult to accurately remove a gravitational acceleration component from an acceleration signal, and the image deterioration is not resolved, and achieves the effect of high accuracy

US9891446B2Active Publication Date: 2018-02-13FUJIFILM CORP
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Patent Information

Authority / Receiving Office
US · United States
Patent Type
Patents(United States)
Current Assignee / Owner
Publication Date
2018-02-13

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Abstract

An imaging apparatus includes: a detection unit that detects accelerations in directions of three orthogonal axes; a generation unit that, in a case in which a difference between the magnitude of a resultant vector of the accelerations in the directions of the three orthogonal axes and the magnitude of the acceleration of gravity is equal to or less than a predetermined threshold value, generates a reference vector using the resultant vector; and a correction unit that corrects an image blur caused by translational shakes in directions of two orthogonal axes perpendicular to at least an optical axis of an imaging optical system, using the reference vector, on the basis of the accelerations in the directions of the three orthogonal axes.
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Description

CROSS REFERENCE TO RELATED APPLICATION

[0001] This is a continuation of International Application No. PCT / JP2015 / 082155 filed on Nov. 16, 2015, and claims priority from Japanese Patent Application No. 2014-258976 filed on Dec. 22, 2014, the entire disclosures of which are incorporated herein by reference.BACKGROUND OF THE INVENTION1. Field of the Invention

[0002] The present invention relates to an imaging apparatus and an image blur correction method.2. Description of the Related Art

[0003] An imaging apparatus has been known which corrects an image blur caused by the shake of the imaging apparatus due to, for example, a hand shake. The shake of the imaging apparatus includes an angular shake of the imaging apparatus about an axis perpendicular to an optical axis and a translational shake of the imaging apparatus in an axial direction perpendicular to the optical axis.

[0004] In the correction of an image blur caused by a rotational shake, in general, an angular velocity about the axis per...

Examples

Embodiment Construction

[0037]FIG. 1 illustrates the outward appearance of an example of an imaging apparatus for describing an embodiment of the invention and FIG. 2 illustrates the structure of the imaging apparatus illustrated in FIG. 1.

[0038]A digital camera 1 which is an example of the imaging apparatus illustrated in FIGS. 1 and 2 comprises an imaging optical system 2 including, for example, a movable lens 2a that is supported so as to be movable in an optical axis direction (z-axis direction) and the directions (an x-axis direction and a y-axis direction) of two axes perpendicular to the optical axis direction, an imaging element 3 that captures an image of an object through the imaging optical system 2, a focusing unit 4 that determines a focus position of the movable lens 2a, a focus driving unit 5 that moves the movable lens 2a in the z-axis direction, and a control unit 6.

[0039]The movable lens 2a is elastically supported by a holder spring 2b so as to be movable in the directions of the x-axis,...